1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your TOTO Purest QR combination toilet system. This system includes the CS232B toilet bowl and the SH233BA toilet tank. Please read this manual thoroughly before installation and use, and keep it for future reference.
The TOTO Purest QR system is designed for general floor drain installations with a 200mm rough-in and features an integrated hand wash basin. It incorporates TOTO's advanced technologies for hygiene and water efficiency.
2. Safety Information
Important Safety Instructions:
- Always turn off the main water supply before attempting any installation or maintenance.
- Wear appropriate personal protective equipment (PPE) such as gloves and eye protection during installation.
- Ensure all connections are secure and watertight to prevent leaks.
- Do not use harsh abrasive cleaners on ceramic surfaces, as this may damage the finish.
- If you are unsure about any part of the installation or repair process, consult a qualified plumber.
- Keep small parts out of reach of children to prevent choking hazards.
3. Setup and Installation
Installation of the TOTO Purest QR combination toilet system requires basic plumbing knowledge. Professional installation is recommended to ensure proper function and to avoid potential damage.
3.1 Pre-Installation Checks
- Verify that your bathroom's floor drain rough-in is 200mm.
- Ensure all necessary components are present: CS232B toilet bowl, SH233BA toilet tank, stopcock, and mounting hardware. (Note: Toilet seat is sold separately).
- Turn off the water supply to the installation area.
3.2 Drain Pipe Preparation
The system uses a slip-in connection for the drain pipe. The drain socket is compatible with 75mm and 100mm VU/VP pipes. The drain pipe should be cut 60mm above the finished floor level for proper connection.
3.3 Bowl and Tank Assembly
- Position the toilet bowl (CS232B) over the floor drain, ensuring proper alignment with the mounting bolts.
- Secure the bowl to the floor using the provided hardware. Do not overtighten.
- Attach the toilet tank (SH233BA) to the bowl, following the manufacturer's instructions for sealing and bolt tightening.
- Connect the water supply line to the stopcock and then to the tank's fill valve. Ensure all connections are hand-tightened, then use a wrench for a final quarter-turn to prevent leaks.
- Slowly turn on the water supply and check for any leaks.
For detailed diagrams and specific torque requirements, refer to the separate installation guide provided with the product packaging.
4. Operating Instructions
The TOTO Purest QR toilet system operates with a standard flush mechanism, designed for efficient water usage.
4.1 Flushing the Toilet
- To flush, press the flush lever or button located on the toilet tank.
- The Tornado Flush system will powerfully and efficiently clean the entire bowl with a 4.8L water volume.
- Allow the tank to refill completely after each flush.
4.2 Using the Hand Wash Basin
The integrated hand wash basin on top of the tank is designed for convenient hand washing. Water used for hand washing flows into the tank, contributing to water conservation.
- After flushing, water will flow into the hand wash basin.
- Wash your hands in the basin. The water will then drain into the toilet tank for the next flush cycle.
5. Maintenance and Cleaning
Regular cleaning and maintenance will ensure the longevity and optimal performance of your TOTO Purest QR toilet.
5.1 Cleaning the Bowl and Exterior
- The toilet features TOTO's Cefiontect ceramic surface, which is exceptionally smooth at a nanometer level. This makes it highly resistant to dirt and stains, and easy to clean.
- The Rimless Design (フチなし形状) eliminates hidden areas under the rim, allowing for a quick and thorough wipe-down.
- Use a soft cloth or sponge with a mild, non-abrasive bathroom cleaner.
- Do not use abrasive powders, scouring pads, or cleaners containing strong acids or alkalis, as these can damage the Cefiontect finish.
- For stubborn stains, a specialized ceramic cleaner designed for Cefiontect surfaces may be used, following the product's instructions.
5.2 Tank Maintenance
- Periodically check the inside of the tank for mineral buildup or debris.
- If necessary, turn off the water supply, flush the toilet to empty the tank, and clean the interior with a soft brush and mild cleaner.
- Inspect the fill valve and flush valve for proper operation.
6. Troubleshooting
This section addresses common issues you might encounter with your TOTO Purest QR toilet system.
| Problem | Possible Cause | Solution |
|---|---|---|
| Toilet does not flush or flushes weakly. |
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| Toilet runs continuously or refills frequently. |
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| Leaks around the base of the toilet. |
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If troubleshooting steps do not resolve the issue, please contact TOTO customer support or a qualified plumber.
7. Specifications
- Model: CS232B (Toilet Bowl), SH233BA (Toilet Tank)
- Brand: TOTO
- Drain Type: Floor Drain
- Rough-in: 200mm
- Hand Wash: Integrated on tank
- Flush Volume: 4.8 Liters (Water-saving)
- Ceramic Technology: Cefiontect
- Flush System: Tornado Flush
- Bowl Design: Rimless (フチなし形状)
- Drain Pipe Connection: Slip-in method, compatible with 75mm/100mm VU/VP pipes.
- Color: #NW1 (White)
- Material (Seat): Polypropylene (PP) (Note: Toilet seat is not included with this combination)

Figure 1: TOTO #NW1 White color sample. This image displays a smooth, square white ceramic tile, representing the pristine white color of the toilet system. The text indicates it's a timeless and popular color reminiscent of fine porcelain.
8. Warranty Information
TOTO products are manufactured to high-quality standards. Specific warranty terms and conditions may vary by region and product. Please refer to the warranty card included with your product packaging or visit the official TOTO website for detailed warranty information applicable to your purchase.
Keep your proof of purchase for warranty claims.
9. Customer Support
For technical assistance, replacement parts, or further inquiries, please contact TOTO customer support.
- TOTO Official Website: www.toto.com
- Refer to your product packaging for regional contact information.